tekmar 552 Thermostat Installation - Manual (Page 40)

© 2014 552_D - 09/14
40 of 44 A Watts Water Technologies Company
Error Message Description
SENSOR 2 OPEN CIRCUIT ERROR
Due to an open circuit, the thermostat is unable to read auxiliary
Sensor 2. The thermostat stops normal operation if Sensor 2
is the only active Room or Floor sensor or if a Floor Maximum
temperature has been set.
Check the auxiliary sensor wire for short circuits according to
the sensor installation manual. It may be necessary to replace
the auxiliary sensor. Once the error has been corrected, the
error message automatically clears.
If the auxiliary sensor 2 has been intentionally removed, set the
Sensor 2 setting in the Setup menu to Off.
NO SENSOR ON ERROR
All of the temperature sensors have been set to Off including
the built-in room sensor.
To clear the error, the Room Sensor, Sensor 1 or Sensor 2 must
be set to measure a temperature.
SYSTEM CONTROL LOST ERROR
The thermostat can no longer communicate to the tekmarNet ®
system control. Check for open or short circuits in the tekmarNet ®
communication wiring. The error automatically clears once the
tekmarNet
® system control has been detected.
If the tekmarNet ® system control was intentionally removed from
the system, remove and then re-apply power to the thermostat
to clear the error.
AIR GROUP MEMBER ERROR
The thermostat can no longer detect its air group or cooling
group master thermostat through the tekmarNet
® system.
To clear the error, either select a heat-cool thermostat to be
the air group master or set this thermostat’s air group member
setting in the Setup menu to be set to None.
SCHEDULE MASTER ERROR
Two thermostats on the tekmarNet ® system have been set to the
same Schedule Master number. The thermostat operates at the
temperature settings while this error is present.
To clear the error, select a different Schedule Master number,
set a different Schedule Member number, set the Schedule to
Zone, or set the Schedule to None.
SCHEDULE MEMBER ERROR
The thermostat can not longer detect its schedule master. The
thermostat operates at the
temperature settings while
this error is present.
To clear the error,
select a different Schedule Member number,
set the Schedule to Zone, or set the Schedule to None.
Error Messages (4 of 5)